ComponentSerializer ser = SerializerRegistry.getInstance()
.getSerializer(fieldType);
AttrImpl attrs = new AttrImpl();
attrs.addAttribute("name", fieldName);
attrs.addAttribute("type", ser.getXMLTypeName());
attrs.addAttribute("nillable", "true");
attrs.addAttribute("minOccurs", "0");
output.startElement("xsd:element", attrs);
output.endElement("xsd:element");